Gas fireplace service
Sweep & inspection
Caps & crowns
Flue relining
Masonry repairLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Why Houston Homeowners Choose HeatShield Chimney Cleaning
HeatShield repair in Houston means something different here than it does in drier parts of the country. We’re an independent HeatShield service provider, not a manufacturer-authorized dealer, and our crews work on HeatShield Cerfractory systems across Houston every month – from older brick chimneys in the Heights to newer builds in Katy. The quick version: HeatShield is a ceramic flue sealant and resurfacing system that restores deteriorated clay-tile flues without a full rebuild, and in Houston it fails differently than anywhere else because our humidity works against the cure. We carry the full independent dealer training on HeatShield application and cure times for Texas weather, and we’ve learned what holds up here and what doesn’t. Call (903) 961-6496 and we’ll tell you the price before we touch a tool.
Why Trust Ashby Chimney Houston for Your HeatShield Chimney Cleaning?
Most chimney companies in Houston can sweep a flue. Far fewer can correctly assess whether the HeatShield Cerfractory coating inside your chimney is still doing its job, and fewer still know how to recoat it when Houston’s humidity sits at 80% and climbing. That’s the part that actually matters. Our owner, Nathan Corliss, picked up his trade knowledge at Los Angeles Trade-Technical College before working in the chimney business full time, and he’s been on Houston roofs for years now – enough to know that HeatShield in Spring or anywhere nearby applied by someone who rushes the cure will blister within two seasons. We stock genuine HeatShield Cerfractory and HeatShield-recommended application tools, we follow the manufacturer’s cure windows, and we pair that with the Kingswell Guarantee: written price before work starts, written guarantee on completion, and if a covered repair fails, we return at no charge. That’s the 365-Day Done Right Promise. As an independent provider, we’re not on HeatShield’s payroll, which means we tell you when repair makes sense and when a rebuild is the honest answer.
Styles & brands we work with
Common HeatShield Chimney Cleaning Problems We Fix in Houston
- Flaking or spalling Cerfractory coating in unlined masonry flues. After years of thermal cycling – Houston’s occasional cold snaps followed by long hot stretches – the original HeatShield Cerfractory can lose adhesion and flake away in sheets. We see this most often in 1960s and 1970s brick chimneys where the clay tile was never smooth to begin with. The fix is removal of loose material, proper surface prep, and a fresh Cerfractory application cured correctly for our humidity.
- Cracked or missing mortar joints behind HeatShield. The coating is only as good as what’s under it. When mortar joints in the flue crack – common in Houston because expanding clay soils shift foundations and chimneys – hot gases escape into wall cavities even if the HeatShield surface looks intact. We inspect behind the coating during a Level 2 inspection, not just at the surface.
- Deteriorated HeatShield around the smoke chamber and throat. High-temperature wood fires concentrate heat right at the smoke chamber. Over time, the Cerfractory there breaks down faster than anywhere else in the flue. This is also where creosote accumulates fastest in Houston’s wood-burning fireplaces. We clean that area thoroughly before any re-coating work.
- Water intrusion through the crown that blisters HeatShield. A cracked chimney crown lets rainwater soak into the masonry and behind the Cerfractory. In Houston’s wet seasons, that trapped moisture causes blistering and delamination – the coating separates from the flue wall. We always check the crown and flashing when a HeatShield system shows bubbling.
- Rushed cures that fail early. This is the one Houston homeowners never see coming. HeatShield Cerfractory needs specific temperature and humidity conditions to cure properly. Applied in high humidity without managing the cure, it can look fine for a season and then start separating. We use infrared heaters and cure management on every application, which is why our work holds.
HeatShield Parts & Our Repair-vs-Replace Approach
We use genuine HeatShield Cerfractory Flue Sealant, HeatShield Joint Repair System, and HeatShield Resurfacing System on every HeatShield repair – no substitutes, no “equivalent” products from a random supplier. But HeatShield doesn’t make every component a chimney needs. For stainless caps, dampers, and flashing, we use quality aftermarket parts from brands like DuraFlex and Gelco, which we stock locally for fast turnaround on Houston jobs. The repair-vs-replace decision comes down to one thing: what’s underneath the coating. If your flue tile is structurally sound but the surface is deteriorated, HeatShield repair is the right call – it costs a fraction of a rebuild and restores the flue to safe operation. If the masonry itself is crumbling or the flue has shifted, we’ll tell you straight that a rebuild is the safer long-term option, even though it means a bigger job for us. Call (903) 961-6496 for an honest assessment – the inspection camera doesn’t lie.
Our HeatShield Service Process – Step by Step
- 1
Diagnosis. We run a Level 2 inspection with a camera through the full flue, looking at the HeatShield surface, the mortar joints behind it, the smoke chamber, and the crown. This is where we find the problems a visual check misses – like the 1940s bungalow near the Heights where our tech found HeatShield Cerfractory flaked away along two-thirds of the smoke chamber, exposing cracked mortar behind it.
- 2
Surface prep and cleaning. Before any sealer touches the flue, we remove creosote with a rotary whip and clean the surface thoroughly. Heavy creosote under Cerfractory is a bond failure waiting to happen.
- 3
Repair or resurfacing. We apply HeatShield Joint Repair System to cracked or missing mortar joints first, then resurface with Cerfractory where needed – including the smoke chamber and throat if they show deterioration.
- 4
Controlled cure. Here’s where Houston weather matters. We manage the cure with infrared heat when humidity is high, because a wet cure is a failed cure. No shortcuts.
- 5
Post-cure inspection and warranty. We re-inspect the flue after curing, document everything with photos, and hand you a written guarantee on the work. If a covered repair fails inside the guarantee period, we return and correct it at no charge.
See the difference
Before
After
Before
After
Before
AfterHeatShield Products We Service & Install in Houston
Our crews work with the full HeatShield line: Cerfractory Flue Sealant for restoring deteriorated clay tile flues, Joint Repair System for cracked mortar joints, Resurfacing System for full flue interior restoration, and ChimneySaver Water Repellent for exterior masonry protection. We stock the most common HeatShield materials locally so a Houston job doesn’t wait on a shipment from out of state. Whether your home is in the Heights, Katy Heatshield service is available, The Woodlands, or closer to the Galleria, we bring the same materials and the same process.
We Also Service These Brands
HeatShield is one of the better flue restoration systems we work with, but it’s not the only one. We also install and repair DuraFlex stainless steel liners and Gelco chimney components. If your chimney needs a full stainless reline instead of a Cerfractory resurface, we’ll tell you that and install the right system for your setup.
FAQs – HeatShield Chimney Cleaning Service in Houston
No. We’re an independent HeatShield service provider. That means we’re not bound by manufacturer sales quotas or upsell targets, and we carry independent dealer training on flue-specific Cerfractory application and cure management for Texas humidity. We recommend HeatShield when it’s the right product for your chimney, and we say so plainly when it isn’t.
For all HeatShield resurfacing and joint repair, we use genuine HeatShield Cerfractory and HeatShield-recommended application materials exclusively. For components HeatShield doesn’t manufacture – stainless caps, dampers, flashing – we use quality aftermarket parts from brands like DuraFlex and Gelco. We’ll show you exactly what goes on your chimney before we start.
A standard HeatShield joint repair or spot resurfacing in a single-flue chimney usually takes one to two days, including surface prep and controlled curing. Full flue resurfacing can take longer, especially in summer when Houston humidity forces us to manage the cure more carefully. We’ll give you a written timeline with the quote, not just a verbal estimate.
We service and install the complete HeatShield residential line: Cerfractory Flue Sealant, Joint Repair System, Resurfacing System, and ChimneySaver Water Repellent. If you have an older HeatShield application from a previous contractor – or you’re not sure what’s in your flue – we can identify it during a Level 2 inspection and tell you what condition it’s in.
We follow HeatShield’s application and cure specifications on every job, using genuine materials and proper surface preparation. Because we’re independent, we can’t make warranty claims on the manufacturer’s behalf, but our work carries our own written guarantee through the Kingswell Guarantee. If a covered repair fails during the guarantee period, we return and fix it at no charge – that’s the 365-Day Done Right Promise.
Most Chimney Sweep services in Houston run between $180 and $300, and a HeatShield inspection or spot repair starts above that depending on what the camera shows. Full flue resurfacing is a bigger job – typically $2,500 to $6,000 depending on flue size and condition. You’ll get a written price before any work begins, so the number on the invoice matches the number we quoted at the door. Call (903) 961-6496 for an exact quote – estimates are free.
In Houston’s humidity, a properly applied HeatShield Cerfractory system typically lasts 10 to 15 years before it needs re-coating, sometimes longer if the crown and flashing stay watertight. The key is the initial application – rushed cures in high humidity shorten that lifespan significantly. We manage the cure with infrared heat when needed, and we document the condition of your coating every time we sweep.
HeatShield Cerfractory is designed to be applied directly over existing clay flue tile. You don’t remove the clay – you restore its interior surface. The existing tile must be structurally sound and properly cleaned first. If the clay is cracked through or shifting, a different repair approach, usually a stainless liner, will serve you better. Our inspection camera will show us which situation you have.
Blisters or bubbles in HeatShield Cerfractory after a chimney fire usually mean moisture was trapped behind the coating when it was applied, or the cure was rushed in humid conditions. When high heat hits trapped moisture, it expands and separates the coating from the flue wall. It can also happen when water has been leaking through the crown for months before the fire. We strip back the blistered material, address the water entry point, and reapply with a properly managed cure – call (903) 961-6496 and we’ll get eyes on it.
Yes. HeatShield protects the flue surface, but it doesn’t stop creosote from building up on top of it, especially in Houston where wood fires run on damp, cooler nights. Annual sweeping keeps the coating clean and lets us inspect for new cracks or moisture issues early. It’s cheaper than a repair you didn’t catch.
Yes, in most cases. The HeatShield Joint Repair System and Cerfractory Resurfacing System are designed to seal the smoke chamber and flue interior, stopping combustion gases from leaking into wall cavities and attic spaces. We apply it to the smoke chamber and throat after removing creosote and loose material. The repair only works if the underlying masonry is sound – if it isn’t, we’ll tell you before we start.
Book Your HeatShield Service in Houston, TX
If your HeatShield system needs service, or you’re not sure what condition it’s in, call (903) 961-6496. We answer with a live person, 24/7. You’ll get a written price before any work starts, and a written guarantee when it’s done. Tell you the price first, explain the work second, put it in writing third – that’s the whole system.
Written by Nathan Corliss, Owner at Ashby Chimney Houston, serving Houston since 2002.